<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>hello vue</title>
</head>
<body>
    <div id="app"> 
        <h2>{{message}}</h2>

        <h2>{{firstName + ' ' + lastName}}</h2>
        <h2>{{firstName}} {{lastName}}</h2>
        <h2>{{getfullName()}}</h2>
        <h2>{{fullName}}</h2>
    </div>
    <script src="../js/vue.js"></script>
    <script>
        
        const app = new Vue({
            el: '#app',    
            data: {    
                message: '你好啊',
                firstName: 'Lebron',
                lastName: 'James'
            },
            computed: {    
                //  计算属性
                fullName: function () {
                    return this.firstName + ' ' + this.lastName
                }  
            },
            methods: {
                getfullName() {
                    return this.firstName + ' ' + this.lastName
                } 
            }
        })
    </script>
</body>
</html>